Liquid dispensing apparatus



' Oct. 8, 1940. R. J. .JAUCH LIQUID DIsPENsING APPARATUS 4 Sheets-Sheet1 Filed April 11, 1938 Oct. 8, 1940. R. J. JAucH 2,216,975

v LIQUID DIsPENsINe APPARATUS Filed April 11, 193e 4 sheets-sneer 42ffoberiJJmC/z,

Oct. 8, 1940K. R, 1 AUCH 2,216,975

i LIQUID DIsPENsING APPARATUS I Filed `April ll, 1938 4 ShQBtS-Shee'tOct. 8, 1940.

R. J. JAUCH LIQUID DISPENSI-NG APPARATUSy Filed April 11, 1938 4Sheets-Sheet 4 Iateritetl 8, 194i) UNITED STATES PATENT OFFICE Robert J.Jauch, Fort Wayne, Ind., asslgnor to The Wayne Pump Company, Fort Wayne,Ind., a corporation of Maryland Application April 11,

4 Claims.

This invention pertains to liquid dispensing.

on the discharge side, before the apparatus is operable to dispenseclear liquid.

r Another object is to provide a liquid dispensing apparatus whereinyliquid is dispensed from the pump only after a predetermined. Vacuum isbuilt up.

Still another object of the invention is to provide a liquid dispensingapparatus adapted to use a centrifugal pump or other'pumping means butwherein th'e system is so constructed and arranged vthat it isself-priming.

A further object of the invention is to provide a liquid dispensingapparatus which is selfpriming and onev wherein a centrifugal pump maybe used'.

A still further object is to provide a liquid'dispensing apparatuswherein thev removal of entralned air is eifected through use of anejector.

-Another further -objet of the invention is to provide a liquiddispensing apparatus operable to dispense liquid only after apredetermined vacuum is built up," b ut one which-is effective without asubstantial adjustment regardless of the lift of liquid from a source`of supply tothe pump of said apparatus.

VA different objectof the'i-nvention isl to provide a pumping unitoperable after a predetermined vacuum is attained, but capable ofthrottling in the event of leakage or areduction in said vacuum.

Yet a different object is to provide a centrifugal pump which isdirectly connected to a vertical motor shaft wherein the motor bearingsare arranged to .accommodate the weight and thrust ofthe impeller andshaft, and one which can be changed froma vacuum suction operation to aiiooded suction operation without any mechanical `change of the device.50. A still different object of the invention is to `:provide acentrifugal pump of high efliciency and one in which liquid is notdispensed until after air or vapor has been eliminated through use `ofyan ejector construction.

55 `Yet another object is to provide a pump con- 193s, serial No.201,235 (c1. 10s-11s) struction wherein the `discharge valves will notopen if the pump is started against a suction leak which exceeds airremoval ability of the ejectors, but if the leak is not too great liquidwill be discharged after air removal but at a 5 reduced capacity, andone wherein no back pressure valve or loaded check valve lisneededbeyond the measuring means or meter, and wherein no air separation orair release means ofA any supplementary nature need be provided.

Yet a further object is to provide a pumping unit wherein there can beno hydraulic shock to the lines and joints when the pump is placed inoperation, and wherein a seal is provided which will permit the drivingmeans to be readi6` ily dissociated from the pump casing without theremoval of extensive connecting lines or parts of the pump housing.

With these and various other objects in view, the invention may consistof certain novel fea- 20 tures of 4construction and operation as will bemore fully described and particularly pointed out in the specification,drawings and claims appended hereto.

- In the drawings, which illustrate embodiments 25 of the device andwherein like reference characters are used to designate like parts-Figure 1 is a developed sectional elevation through the pumpconstruction embodying the invention;

Figure 2 is a sectional elevation through the outlet and settlingchamber of the pump construction embodying the invention;

Figure 3 is a top plan view of thepump construction illustrated inFigures 1 and 2; I

Figure 4 is a ytransverse sectional elevation taken inthe plane asindicated by line 4 4 of Figure 3jv Figure 5 is a sectional vtop planview taken substantially in the plane as indicated by the line 40 5-5 ofFigure 2; l f

Figure 6 is an enlarged fragmentary -elevation, partly in section,showing the seal construction for the motor shaft;

Figure 7 is an enlarged elevation, partly in 45 section showing amodified form of sylphon seal.

This application is a continuation-in-part of Patent No. 2,124,681,granted July 26, 1938.

I In the pump construction illustrated, the pump casing 20 is providedwith the inlet casting 22 which is adapted to be connected to a sourceof liquid supply not shown, the inletr being provided with suitablefastening means; such as the iiange 24 for attachment to a pipe lineadapt- 55 ed to be connected to a source of supply (not shown).

Said inlet casting is provided with a screen 26 for preventing the entryof foreign material 'into the pump, the screen being accessible throughthe cover plate 28 suitably secured to the casting above the screen. Thescreen is provided in a well 30 whereby there is formed in the inletcasting a manifold or baiiie for maintaining a certain predeterminedliquid level in the pump casing after it has once been primed. The inletcasting is secured as at 32 to the pump casing 20 and supplies liquid tothe suction chamber 34 through the inlet opening 36. The suctionchamber34 is disposed above the impeller chamber 38 which is preferably formedby the bottom plate 40 suitably secured as at 42 to the casing20.l y lThe upper portion of the pump casing is provided with the seal 44adapted to have cooperative relation with the vertically extending motorshaft 46, the motor shaft 46 being rotated by means of the motor 48mounted on the pump casing as at 50. The seal 44 is preferably designedso that the motor may be removed or replaced without the necessity ofdisturbing any piping after the pump is once installed and is designedso that a minimum of parts of the pump assembly needbe moved in applyingthe motor. To this end a sleeve 52 is threaded as at 54.to the motorshaft, shellac or litharge forming a seal to prevent leakage, the sleevehaving a lower bearing face 56.

The gland 58 is threaded as at 60 into the casing 20, preferably in awell or basin 62 provided in the top thereof below the motor, and a co1-lar 64 is threaded as at 66 into the base of the gland 58, the collarbeing spaced from the shaft 46. The lower plate 68 is supported on thecollar 64 by being fastened bet-Ween said collar and the shouder 10formed in the gland.

A vertically extending cylindrical sleeve 12 is disposed between themember 68 and the upper seal supporting member 14, the member 14 havinga snug t adjacent its periphery with the inner surface of the gland inorder to form a guide for the sylphon 16 disposed between the members 68and v14 and preferably being secured to said members. The memberl 14 isprovided with a seal ring 18 suitably secured therein as by means of therecess 80 provided inthe member 14 and the upward extending inner and Iouter flanged and refianged members 82 and 84, said member 18 beingpreferably of carbon, having a flattened upper surface 86 adapted tohave sliding and sealing engagement with the surface 56 of the sleeve52.

A The member 12 prevents the sylphon from being crushed as when themotor is being applied. The sylphon forms a seal preventing leakage intothe basin 62 and in some instances it may be desired to provide anexpansion spring 88 disposed lbetween the member 68 and 14 to aid thespring action of the sylphon or to take some of the spring effect of thesylphon and thus lessen wear thereon.

The casing is provided with the passage 90 extending from the basin 62and provided with the overflow breather member 92, causing any leakage,should it occur pas't the seal, to be conducted from the motor bearings.Also the passage forms means for 'introducing oil into the well 62supplying lubricant to the surfaces 56-86,l and this may be done byremoving the cap of the breather member. This passage 80 being below themotor bearing prevents any liquid from reaching the bearing and alsoacts as a telltale to show excessive leakage. y

The shaft 46 adjacent the lower end thereo isprovided with'the impeller94, secured thereto as at 96 and rotating in the impeller chamber, theeye -of the impeller being adapted to receive liquid from the suctionchamber, suitable sealing means 98 being preferably provided such asshown and described in Patent 2,124,681, granted July 26, 1938, toprevent the impeller becoming air bound. The impeller chamber 38, whichmay be provided with the drain |00, is in communication with a passage|02 of said chamber which may conveniently be termed a pressure passage.The pressure passage communicates with a jet |04, which is aligned withand communicates with the ejector tube |06 which is preferably of theVenturi type, the jet and ejector tube forming ejector means, and beingin suction communication with a jet chamber or an ejector vacuumvestibule |08 which is in communication with the suction chamberadjacent a high point thereof as at |09. The jet and ejectors may be ofany convenient number, differing upon the capacity of the pump. Forexample, a pump rated at 100 G. P. M. using a 3 H. P. electric motor fordriving means, utilizes three jets of a predetermined size which it hasbeen found are more eflicient than ejector means of any other number.

The jet chamber also is connected to the suction chamber by means of thepassage extending downwardly to a point near the eye of the impellerwhereby when the jet is priming the vapor is drawn from the eye of theimpeller or from the suction chamber 34, and

after the vapor is exhausted and solid liquid is' being passed throughthe passage ||0, the efflciency of the pump is increased. The ejectortube communicates with a transfer corridor or Y ejector line ||2 whichcommunicates with the float chamber or ejector discharge settlingchamber ||4. The settling chamber ||4 is provided with a small opening||6 forming communication between the settling chamber ||4 and thesuction chamber 34. Passage of liquid through said opening is controlledby the valve ||8 which, as shown, is of the rotary sleeve type, saidvalve being operated from fully closed to fully open position by meansof the float |20 connected to said valve by means of the stem |22, theposition of the float being determined by the amount of liquid in thesettling chamber thus controlling the operation of the valve.

In order to provide a pump which may be used either on a suction line orfor a ooded suction the settling chamber ||4 is connected to a floatchamber |24 as at |26, the baille |28 being provided between saidchambers. 'Ihe chamber |24 is provided' with a well |30 in which thefloat |32 is disposed, the bottom of the well being provided `with adrain |34. The well |30 is always provided with a predetermined amountof liquid as determined by the aperture |35 and the oat is pivotallyconnected as at |36 to the lever |38, the opposite end of said leverbeing pivoted at A|40 to the wall of chamber |24.

The lever |38 is pivotally connected to the valve stem |42, the upperend of which is provided with the vent control valve |44, the vent valve|44 controlling the vapor outlet |46 which may be attached to the wellknown vent pipe |48, and a screen may be provided either in the opening|26 or the opening |46 to form further ing |52, the valve chambercommunicating with the inter-valve chamber |54, preferably provided withthe drain |66, said valve chamber communicating with the cylindricalvalve 'chamber |58, disposed adjacent and communicating with the outletchamber |00, the outlet chamber preferably being provided with theflange |62 to facilitate'attachment of piping to the outlet. The valvechambers |60 and |58 rare provided with the vertically sliding sleevevalves I 64 and |66, said sleeve valves having the planes of their loweredges angularly disposed with re spect to the axes to increase thegradually thru?,- tling effect, and said valves are provided withspiders |68 and |10 adapted to'be pivotally conlnected to' thevertically extending piston rods |12 and |14, saidrods extendingupwardly through suitable stuiiing boxes |16 and |18, the upper ends ofsaid rods being pivotally or flexibly con'- nected to the pistons |80and |82, the pistons being provided with suitable leathers |84 and' |86and sliding in the cylindrical chambers |88 and |90.

The pistons are provided with the upwardly extending guide rods |82 and|84 projecting into suitable guides |86 and |88 provided in the hoods orvalve covers 200 and 202. The guides are provided with removable caps204 and 206 to facilitate freeing the valves should they stick as by theinsertion of a suitable tool engaging in the threads 208 and 2|0.' Thepistons are provided with the primary weights 2| 2 and 2|4 directlyengaging said pistons, and disposedt above the primary weights,secondary weights 2|6 and 2|8 are provided, said secondary weights beingso disposed that a predetermined movement of the piston is necessary inan upward direction before the secondary weight is effective, and forthis purpose the secondary weights are provided with the dependingskirts 220 and 222 engaging the upper edge of the cylinders |88 and |90,the lower stop for said secondary weights thus being provided, the upperstops for the valves being provided by the removable caps 204 and 206.

The jet chamber |08 is connected to the hoods 200 and 202 and thus tothe upper side of saidpistons by means of the passage 224 whichcommunicates with the hood 200, the hoods being connected above saidpistons by means of the passage 226. 'I'he piston chambers below thepistons in the cylinders |88 and |90 are connected by means ofthepassage 228 and an external line in the form of a pipe or conduit 230is connected at one end as at 232 to the inlet casting 22, the other4end of said line being .connected as at 234 to the connection 228.

In operation of this device, assuming that the pump casing is dry,enough liquid is added, preferably to establish the liquid level asdetermined by the inlet 36. The sleeve valves |64 and |66, of course,are closed, being maintained in this position by means of the'vprimaryWeights 2|2'l and 2|4. When the motor control is operated to start themotor 48, said motor causes rotation of the shaft 46, which inl turn-rotates the impeller 94, causing liquid supplied to the impeller fromthe suction chamber 84 to be discharged by said impeller into theimpeller cham-4 ber and upwardly of the passage |02. The valve |64 beingclosed, the liquid will'pass upwardly through the jet and ejector tube,tending to cause a vacuum to be formed in the jet chamber |08.

The vacuum causes iiow of vapor or pulls the vapor from the suctionchamber through the passage into the vacuum chamber where it will beexhausted by means of liquid passing through the ejector. Also, thevacuum in the jet chamber causes a vacuum in theV chambers above thepistons, that is, within the valve covers 200 and 202, tending to causethe pistons |80 and |82 to move upwardly, but upward `movement of thepistons is resisted by the vacuum below said pistons |80 and |82 due tothe suction occurring on the suction side of the pump communicated tothe said pistons below the same, through the conduit 280 and passage228, and also upward movement of the pistons will be resisted by theprimary weights 2|2 and 2|4.

Liquid passing through the ejector will flow through the ejector line||2 into the settling chamber 4 and after the liquid has reached apredetermined level, upward movement of the float |20 will cause openingof the valve ||8 to permit liquid to flow through the port ||6 to thesuction chamber, and thence to the eye of the impeller. Vapor isreleased in the settling chamber and passes upwardly through the opening|26 and to the vent pipe |48, inasmuch as the valve |44 will be opened.After the air has been eliminated and the pump is pumping solid liquid,the vacuum created by the jet will overcome the primary and secondaryweights and the suction vacuum below the pistons, permitting the pistonsto move upwardly to open the valves |64 and |66, whereupon liquid willpass outwardly to be dispensed. By the use of the primary and secondaryweights there will be less vacuum differential necessary to initiallyopen the valves, due to the fact that the primary 4 weight is eifectiveprior to the time when the secondary weight becomes effective, i. e., upto the time when the valves are but slightly cracked, and bythe use ofsleeve valves the surge of liquid in priming has no tendency to unseatthe valves to thereby decrease the amount of priming liquid provided inthe pump casing.

By the use of a plurality of ejectors rather than a booster pump, a moreefcient device is provided, inasmuch as the vacuum created by theejectors is proportional to the liquid pressure going'through theejectors. The more air through the ejectors, upto a certain point (thatis, the capacity of the ejector), the more efficient the lejectorsbecome and the greater the air removing capacity possible. Should anamount of air be introduced, the vvalves will throttle due to thedifference in vacuums, permitting greaterA supply of liquid to theejectors,'whereby the air is removed and more quickly vented to theatmosphere. With the use of an ejector instead of past the rst valve isconsiderably diminished when it reaches the second valve |66 and thusthe latter-.valve will effectively hold the liquid in the casing topermit the priming operation. Use of the second valve is particularlyeffective when comparatively long periods of priming are encountered as,for example, when the pump is used on a long suction line.

In the present embodiment pressure is increased by throttling thevalves, which throttling results from the increase of vapor and air inthe casing, so that in the embodiment shown,

it is possible to obtain maximum efficiency at supplied to the chamber|24-which will be precipitated. When the level reaches a certainpredetermined amount the float |32 will close the valve |44, and thusthere is always a predetermine'd 'amount of liquid adjacent the floatand in going from normal suction condition to a flooded suctioncondition, the predetermined amount of liquid will permit the oat |32 toclose the valve |44 rapidly when the liquid level is raised to prevent acharge of liquid being lost through the vent tube |48. Also, bymaintaining a liquid level of a predetermined amount for the iloat |32,a minimum of additional liquid will cause the valve |44 to close so thatthe float causes a quick response .to any liquid supplied to the chamber|24.

It is to be understood that I do not wish to be limited by the exactembodiments of the device shown, which are merelyby way of illustrationand not limitation as various and other forms o'f'the device will ofcourse be apparent to those skilled in "the" art without departing from-the spirit ofthe invention or the scope of the claims.

What is claimed is:

1. In a pump, the combination of a casing having a suction chamberadaptedto be connected to a source of supply, an impeller chamber, animpeller mounted to' rotate in said impeller chamber andadapted to besupplied ,with liquid from said suction chamber, a jet chamber, aconnection between said jet chamber and said impeller chamber, asettling chamber provided with a vent and connected to said suctionchamber to supply liquid to said suction chamber after a predeterminedamount of liquid-is in said settling chamber, a connection between saidjet chamber and said settling chamber, ejecting means in said jetchamber receiving liquid'from said impeller and supplying it to saidvsettling chamber, a valve controlling the discharge from said impellerchamber, a piston connected to said valve for operating said valve, oneside of said piston being connected to said jet chamber, the other sideof said lpiston -being connected to the suction chamber, a weightnormally tending to close said valve, and a secondary Weight inoperativewhen said valve is lin predetermined position but operative to.tend.toclose said valve after said piston has moved to a predeterminedposition.

2. In a pump, the combination of a casing hav ing a suction chamberadapted to be connected to a source of supply, an impeller chamber, animpeller mounted to rotate in said impeller chamber and adapted to besupplied with liquid from said suction chamber, a jet chamber, aconnecttion between said jet chamber and said impeller chamber, asettling chamber provided with a vent and connected to said suctionchamber to supply liquid to'said suction chamber after a predeterminedamount oi liquid is in said settling chamber, a connection rbetween saidjet charnber and said settling chamber, ejecting means in said j etchamber receiving liquid from said impeller and supplying it to saidsettling chamber, a valve controlling the discharge from said impellerchamber, a piston connected to said valve for operating said va1ve,'oneside of said piston being connected to said jet chamber, the other sideof said piston being connected to the suction chamber, and meansnormally tending to close said valve.

3. In a pump, the combination of a casing having a suction chamberadapted to be connected to a source of supply, an impeller chamber, animpeller mounted to rotate in said impeller ,chamber and adapted to besupplied with liquid from said suction chamber, a jet chamber, aconnection between said jet chamber and said impeller chamber, asettling chamber'provided with a vent and connected to said suctionchamber to supply liquid to said suction ch'amber'after a predeterminedamount of liquid is in said settling chamber, a connection between saidjet chamber and said settling chamber, ejecting means in said jetchamber receiving liquid from said impeller and supplying it to saidsettling chamber, a valve controlling the discharge from said impellerchamber, a piston connected'to said valve for operating said valve, oneside of said piston being connected to said jet chamber, the other sideof said piston being connected to the suction chamber, means normallytending to close said valve, and other means inoperative when said valveis in predetermined position but so arranged that it is operative totend to close said valve if said piston is moved to a predeterminedposition.

4. In a pump, the combination of a casing having a suction chamberadapted to be connected to a source of supply, an impeller chamber, animpeller mountedv to rotate in said impeller chamber and adapted to' besupplied with liquid from said suction' chamber, ajet chamber, aconnection between said jet chamber and said'impeller chamber, asettling chamber provided with a vent and connected to said suctionchamber to supply'- liquid to said suction chamber after a predeterminedamount'of liquid is in said settling chamber,- a connection between saidjet chamber and said settling chamber, ejecting means in said jetvchamber receiving liquid from said impeller and supplying it tdsaidsetting chamber, avalve controlling the discharge from said impellerchamber, said valve being a sleeve valve having the lower edge disposedin a diagonal plane extending downwardly and away from the port of saiddischarge, a piston connected to said valve for operating said valve,one side of said piston being connected to said jet chamber, the otherside of said piston being connected to the suction chamber, a weightnormally tending to 4close said valve, and-a secondary weightinoperative when said valve is in predetermined position but operativeto tend to close said valve after said piston has moved to apredetermined position.

ROBERT J. JAUCI-l.

